Guangzhou has a south subtropical oceanic monsoon climate. The to-pography is featured by northeast higher than southwest, northand northeast being mountain area, hills and mesas in the middle, and fluvial plain in the south. Being in the area of low latitudes and adjacent to the South China Sea, as well as with the alternate influence of the winter and summer monsoon, the climate is characterized by abundant sunshine and rainfall, warm weather without bitter cold. February to March is spring; April to September is summer; October to November is autumn; December to next January is winter.

Temperatures are relatively high all the year around, with an annual av-erage of 22 C. Temperature changes following a single peak type, with the highs in July and August and the lows in January. In most of the time in a year, there is sufficient rainfall, with distinct rainy season. April to September is the rainy season, which accounts for more than 80% of the annual total. The wet-test months are May and June, with monthly rainfall up to 280-300 mm, usually associated with heavy rainfall. The less wet period is from November to next January. Under the influence of subtropical high, the downdraughts make Oc-tober and November prevailed by sunny weather. From December to next March, under the control of the continental polar air masses, it is relatively cool and dry.

Pressure

monthly mean atmospheric pressure

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Pressure(hPa)

10159

10141

10112

10078

10047

10011

10005

10003

10050

10097

10139

10164

Pressure (hPa)

10159

10141

10112

10078

10047

10011

10005

10003

10050

10097

10139

10164

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.1 monthly mean pressure

Temperature

monthly mean temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Temp(oF)

56.4

58.2

64.2

71.7

77.9

81.6

83.4

83.1

80.9

75.5

67.2

59.5

Temp(oC)

13.6

14.6

17.9

22.1

25.5

27.6

28.6

28.4

27.2

24.2

19.6

15.3

Temperature (oC|oF)

13.6 oC 56.4 oF

14.6 oC 58.2 oF

17.9 oC 64.2 oF

22.1 oC 71.7 oF

25.5 oC 77.9 oF

27.6 oC 81.6 oF

28.6 oC 83.4 oF

28.4 oC 83.1 oF

27.2 oC 80.9 oF

24.2 oC 75.5 oF

19.6 oC 67.2 oF

15.3 oC 59.5 oF

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.2 monthly mean temperature

monthly extreme mean temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Min Temp(oF)

50.5

53

59.3

67.1

72.8

76.6

77.9

77.7

75.2

69.4

60.6

52.7

Min Temp (oC)

10.3

11.7

15.2

19.5

22.7

24.8

25.5

25.4

24

20.8

15.9

11.5

Max Temp (oF)

64.9

65.3

70.8

78.2

84.7

88.7

91

90.8

88.7

83.8

76.1

69

Max Temp(oC)

18.3

18.5

21.6

25.7

29.3

31.5

32.8

32.7

31.5

28.8

24.5

20.6

monthly extreme daily temperature

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Min Temp(oF)

33

34.7

37.7

46.9

58.2

65.8

70.8

69.6

60.4

49.1

40.8

32

Min Temp (oC)

.6

1.5

3.2

8.3

14.6

18.8

21.6

20.9

15.8

9.5

4.9

0

Max Temp (oF)

80.9

83.4

89.7

90.3

97.1

97.8

100.5

100.4

98.9

94.6

90.5

84.9

Max Temp (oC)

27.2

28.6

32.1

32.4

36.2

36.6

38.1

38

37.2

34.8

32.5

29.4

Humidity

monthly mean hunidity

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Hunidity (%)

72

78

82

84

84

84

82

82

78

72

66

66

Hunidity (%)

72

78

82

84

84

84

82

82

78

72

66

66

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.3 monthly mean hunidity

monthly minimum daily hunidity

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Hunidity(%)

12

13

15

22

26

21

37

31

24

15

16

12

Precipitation

monthly mean precipitation

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Precipitation(mm)

40.9

69.4

84.7

201.2

283.7

276.2

232.5

227

166.2

87.3

35.4

31.6

Days (Precipitation<0.1mm)

7.5

11.2

15

16.3

18.3

18.2

15.9

16.8

12.5

7.1

5.5

4.9

Days (Precipitation<10mm)

1.2

2.3

2.5

5.4

7.2

7.8

6.8

6.7

4.9

2.4

1

1

Days (Precipitation<25mm)

.3

.5

.7

2.7

3.6

3.4

3.1

2.6

1.9

1.2

.3

.4

Days (Precipitation<50mm)

.1

.1

.1

.8

1.4

1.1

.9

.8

.7

.4

0

0

Precipitation (mm)

40.9

69.4

84.7

201.2

283.7

276.2

232.5

227

166.2

87.3

35.4

31.6

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.4 monthly mean precipitation

monthly maximum daily precipitation

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Precipitation(mm)

75

89.2

179

119.8

215.3

210.9

111

239

156.4

110.7

116.3

46.1

Wind

monthly mean wind speed

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Wind Speed(m/s)

1.7

1.7

1.6

1.6

1.7

1.8

1.9

1.5

1.5

1.8

1.8

1.7

Wind Speed (m/s)

1.7

1.7

1.6

1.6

1.7

1.8

1.9

1.5

1.5

1.8

1.8

1.7

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.5 monthly mean wind speed

monthly maximum daily
wind speed and direction

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Wind Speed (m/s)

10

13.7

9.5

11

12.3

13.5

16.8

16

19.1

16.7

13.7

10.5

Sunshine

monthly mean sunshine duration

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Duration (hour)

118.5

71.6

62.4

65.1

104

140.2

202

173.5

170.2

181.8

172.7

166

Duration (hour)

118.5

71.6

62.4

65.1

104

140.2

202

173.5

170.2

181.8

172.7

166

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

fig.5 monthly mean sunshine duration

monthly sunshine percentage

Month

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Percentage (%)

35

22

17

17

26

35

49

43

46

51

52

50

Remarks:
Weather forecast is provided by China Meteorological Administration.
Climate information is based on monthly averages for 30-year period of 1971-2000.
Precipitation includes both rain and snow.